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Forum Discussion
C6900 periodic poor download/upload speeds
I have been having issues with download/upload speeds for a number of weeks. When I do the speed test, the numbers are all over the place. I had a Comcast tech out week before last. I was told he is a senior tech and works mostly on the business side. So, I felt comfortable that he knows what he's doing. He checked things at the box where all of the homes in my neighborhood are hooked up. He checked the connection that comes out of the ground and then cable that comes into my home all the way to the modem. He determined that the modem is failing and that he'd seen a fair number of "these" that failed right out of the box. So, I bought a new modem/router, but have not hooked it up. I'd like to get an opinion from the smart folks before I go through the hassle of installing a new modem and reconfiguring my network and all of the attached devices.
The log file indicates a timing synchronization failure at the modem. There is also mention of another MAC address (CMTS). I cannot find this MAC address on my network, anywhere.
If I've left something out that would help, please let me know. I know nothing about these gizmos. Thank you.
10 Replies
The C6900 is a cable modem/router.
While many questions about routers are generic and could be answered anywhere, some things need specialist knowledge.
You might get more help, and find earlier questions and answers specific to your device, in the appropriate section for your hardware. That's probably here:
Cable Modems & Routers
You might like to search there for messages related to your problem.
I will ask the Netgear moderator to move your message.
In the meantime you could visit the support pages:
Support | NETGEAR
Feed in your model number and check the documentation for your hardware. Look at the label on the device for the model number.
Check for various troubleshooting tips.
You may have done this already. I can't tell from your message.
I mention it because Netgear stopped supplying printed manuals and CD versions some years ago and people sometimes miss the downloads.Thank you for the reply and pointing out I posted in the wrong forum. I am sorry about that. I don't normally make that kind of mistake.
I have consulted the Netgear site for solutions. They offer nothing related to troubleshooting other than referring folks to their ISP.
I've also found a couple of other posts regarding this same issue, but it's not very clear to me, that the issue is related to the line of modem/router.
ossodiseppia wrote:
Thank you for the reply and pointing out I posted in the wrong forum. I am sorry about that. I don't normally make that kind of mistake.
Easily done, especially given the messy nature of this place.
I just wanted to point you in the direction of messages that might cover your hardware.
